Measuring device



Aug- 9, 1932- P. vlLLlAMsoN, JR 1,870,393

MEASURING DEVICE Filed Jan. 19, 1951 A A A A A A A A A AA v v v v v v v v v v vv HG' 4 INVENTOR Patentecl Aug. 9, 1932 UNITED sra'ras :PETER WILLIAMSON, JR., OF EVEBETT, MASSACHUSETTS MEASURIN G DEVICE Application filed January 19, 1931.

My invention relates to measuring devices and particularly to measuring devices for centralized lubricating systems. Itmay also 4be used as a dispensing device for fiuids of various kinds and particularly liquids.

One object of the invention is to provide a novel and eiiicient fluid measuring device for use in lubricating systems of the intermittent pressure type.

A more general object of the invention is to provide an eflicient and accurate device for accurately measuring predetermined quantities of liquids of any kind.

The following is such a full, Clear, and complete description of my invention as will, after considerati on of the accompanying drawing, enable any mechanic skilled in the art to make and use the device.

In the drawing Figure l shows across sectional view of the preferred embodiment of the device. V A Figure 2 is a cross sectional view of a modification, the parts being the same, except for the omission of the check valve, and taken with'the parts in a different position.

Figure 3 is a cross sectional view of the same parts, except the check valve, but in a still different position.

U Figure 4 is a cross sectional view of the parts shown in Figures 2 and 3 with the parts in another position.

:Figure 5 is a side elevation of the device.

Figure 6 is a plan view of the device.

The reference numeral 1 indicates a body r member, preferably formed as a die casting and having threads 2 by means of which it may be connected to any device to which lubricant or any-other fluid is to be supplied. The body member is also provided with screw threads 3 and 4 by means of which it Lmay be connected into any suitable pipe line. It will be understood that thelubricant or fiuid may pass directly through the device by means of the passageway 5 so that the conduitmay pass on to other devices which are to be supplied with lubricant in the same manner.

If'the device is to be used singly or if the particular device is at the end of a pipe line, it will be understood that a pipe cap may he Serial No. 509,815.

used to plug the end of the conduit at 3 or a by simply screwing the pipe cap on to the thread inst-ead of connecting the pipe thereto. The body member 1 is provided with. a cylindrlcal bore 6 communicating at its' nlet end with the passageway 5. A piston, preferably of the cup leather type, as indicated at 7, is slidably fitted to the bore 6, and

a comparatively strong spring 8 held in po-..

member 1 and a piston 11 preferably of the cup leather type is fitted to the bore. A com-s paratively weak spring 12 held in position by the plug 13 normally holds the piston 11 at the inlet end of the bore. It should be noted that the plug 13 completely seals the lower.,`

end of the bore as shown in Figure 1.

A pair of'cross passages 14 and15 are formed in the body member connecting the bore 6 and 10. It will be understood that these cross passages are drilled through both walls of one of the bores and then the holesN through the outer wall are plugged up. The holes through the outer wall are not shown because they have nothing to do with the invention and any mechanic may improvise means for forming the bores 14 and 15.

A ball check valve 16 is yieldably held in closed position by a spring 17 which is in turn retained by the perforated threaded plug 18. This check valve may be of any type and doesV not necessarily embody a ball and spring.

The bores 6 and 10 may, if desired, be made with a slight taper toward the lower end,y as shown in Figures 1 and 2. This is particularly desirable if a die casting is used for y making the body member. The slight fleX- ing of the pistons 7 and 11 as they move up and down the bores is quite desirable, maintaining the leathers in a soft and fiexible condition.

It will be further understood that the above mentioned pipe line will be connect-ed to a source of intermittent fluid pressure so that a varying fiuid pressure will exist in the passageway 5 in the body member 1. The degree of pressure is not important, but for proper operation of the device, the'pressure should fiuctuate from atmospheric or very little over that, to a considerably higher pressure, for instance, not less than poundsV 14, and the fluid then flows through the passageway 14 into the cylinder 10 and there dis laces the piston 11 and moves it to the end oflts stroke. As the pressure continues to increase, the piston 7 is moved to the end of its stroke also, and the pistons 7 and 11 are then in the positions shown in Figure 3, in which position they remain'until the pressurein the passageway 5 is released.

VVhen the pressure is released in the passa ewa 5 the ressure e-Xerted by the stron!Y v y 3 p o spring 8 returns the piston 7 to the inlet end 'of the stroke, as shown in Figure 4. During this time, the piston 11 is maintained at the outlet end of its stroke. After the parts have assumed the positions as shown in Figure 4, the comparatively weak 'spring 12 returns the piston 11 to the position shown in Figure 1.. During this movement, the lubricant is displaced by the piston 11, returning through the passageway 14 behind' the' piston 7 and into the lower or outlet portion of bore 6. From there it flows back through the passageway 15 into the lower portion of the cylinder 10, thus taking up the empty space which is left behind the piston 11.

The parts remain in the position shown in Figure 1 until after the next impulse of pressure, and when this impulse occurs, the movement of the pistons 7 and 11 toward the Outlet end of the device discharges a predetermined quantity of lubricant through the perforation in the member 9. The outer side of this perforation forms a check valve seat with whichcooperates a ball check valve 16 which is ,held in closed position by a spring 17 mounted in the member 18 which is threaded in'the lowerv end of the bore 6. After the parts have been moved to the position shown inl Figure 3 land the lubricant discharged from the cylinder 6 which may be termed the discharging cylinder, the comparatively strong spring 8 returns the piston 7 to the inlet end of the cylinder 6 leaving a vacuum behind it in the lower or Outlet portion of the discharging cylinder. The piston 11 is then returned by the comparativehT weak spring 12 `to the inlet end of the cylinder 10, therebf.Y reloading the cylinder 6 with lubricant and transferring the vacuum to the lower end of the cylinder 10. The parts have then returned to the position shown in Figure 1 and when the next impulse of pressure' occurs, the piston 7 is moved to the position shown in Figure 2 and then the piston 11 is Inoved to the position shown in Figure 3, filling up the vacuum behind it and taking in a charge of lubricant in the upper portion of the cylinder 10. The continued flow of lubricant through the passageway 5 then overcomes the strength of the-spring 8 and moves the piston 7 to the position shown in Figure 3 discharging a predetermined quantity of lubricant through the check valve 16. It will be understood that this check valve 16 may be of any formationas long as it serves the purpose of an outwardly opening check valve.

In brief, it may be said that the deviceoperates to, first, segregate a charge of lubricant to be discharged at the next operation; secv,

ond, to discharge positively under pressure a charge of lubricant which was segregated at the previous operation; third, to reload the charging cylinder with the predetermined charge of lubricant which was last measured and to repeat this series of operations as long as the pressure is applied and relieved.

Having described my invention, the following is what I claim:

f 1. In a device of the class described, means.

forming a discharging cylinder and a reloading cylinder, pistons in each of said: cylinders, means for supplying lubricant to said discharge cylinder under intermittent pressure, and a pair of cross passages connecting said cylinders, the piston in said discharging cylinder traversing one of said cross passages the other of said passages being constantly open.

2. In a device of the class described, means forming a discharging cylinder and al reloading cylinder, pistons in each ofsaid cylinders, means for supplying lubrcant to. said discharge cylinder under mtermittent pressure, a pair of cross passages connecting said.

cylinders, the piston in said discharging cylinder traversing one of said cross passages, and a check valve in the outlet end of the discharging cylinder.

V3. In a device of the class described, a body member having a pair of parallel cylinders therein, a pair of cross passages connecting said cylinders, pistons in said cylinders, one of said pistons traversing one of said cross passages, said last named piston being held in one position by a comparatively strong spring and the other said pistons being held in one position by a comparatively weak spring.

4. In a device of the class described, a body member having a discharging cylinder and a reloading cylinder of substantially equal size thcrein, pistons in each of said cylinders,

cross passages connecting said'cylinders at twof different points, the piston in said discharging cylinder traversing one of said cross passages, a strong spring for normally holding the piston in said discharging cylinder in one position, and a weak spring for holding the piston in said reloading cylinder in one position.

5. In a device of the class described, a body member having a pair of parallel cylinders therein, one of said cylinders being a discharging cylinder and the other of said cylinders being a reloading eylinder, pistons in each of said cylinders, a strong spring for Operating the piston in the discharging cylinder, a weak spring for Operating the piston in the reloading oylinder and passageways connectin said cylinders, one of said passageways eing traversed by one of said pistons.

6. In a device of the class described, a body member having a pair of parallel cylinders therein, passageways connecting said cylinders one of said cylinders being a discharging cylinder and the other of said cylinders being a reloading cylinder, pistons in each of said cylinders, a strong spring for operating the piston in the discharging cylinder, and a weak spring for Operating the piston in the reloading cylinder, and an outwardl;r opening check valve in the outlet end of the discharging cylinden In testimony Whereof I affix my signature.

PETER WILLIAMSON, JR. 

